Function invalidReexport

packages/compiler-cli/src/ngtsc/scope/src/local.ts:760–786

* Produce a `ts.Diagnostic` for an exported directive or pipe which was not declared or imported * by the NgModule in question.

(
  decl: Reference<ClassDeclaration>,
  rawExpr: ts.Expression | null,
  isStandalone: boolean,
)

 * by the NgModule in question.
 */
function invalidReexport(
  decl: Reference<ClassDeclaration>,
  rawExpr: ts.Expression | null,
  isStandalone: boolean,
): ts.Diagnostic {
  // The root error is the same here - this export is not valid. Give a helpful error message based
  // on the specific circumstance.
  let message = `Can't be exported from this NgModule, as `;
  if (isStandalone) {
    // Standalone types need to be imported into an NgModule before they can be re-exported.
    message += 'it must be imported first';
  } else if (decl.node.getSourceFile().isDeclarationFile) {
    // Non-standalone types can be re-exported, but need to be imported into the NgModule first.
    // This requires importing their own NgModule.
    message += 'it must be imported via its NgModule first';
  } else {
    // Local non-standalone types must either be declared directly by this NgModule, or imported as
    // above.
    message +=
      'it must be either declared by this NgModule, or imported here via its NgModule first';
  }
  return makeDiagnostic(
    ErrorCode.NGMODULE_INVALID_REEXPORT,
    getDiagnosticNode(decl, rawExpr),
    message,
  );
}

/**
 * Produce a `ts.Diagnostic` for a collision in re-export names between two directives/pipes.